christian-korneck

quick & dirty powershell query with appsmith

(WARNING - very insecure)

on windows worker (here on docker host):

webify powershell -c "Get-WmiObject -Class win32_processor | Select-Object -Property Caption, DeviceID, Manufacturer, MaxClockSpeed, Name, SocketDesignation | ConvertTo-Json -Compress"
2023/03/26 16:31:11 listening on :8080, proxying to powershell -c Get-WmiObject -Class win32_processor | Select-Object -Property Caption, DeviceID, Manufacturer, MaxClockSpeed, Name, SocketDesignation | ConvertTo-Json -Compress

christian-korneck

"""Use it like this: main('192.168.1.0/24')"""

IPV4_MIN = 0
IPV4_MAX = 0xFFFFFFFF

def not_network(ipv4_address, ipv4_netmask):
    assert IPV4_MIN <= ipv4_address <= IPV4_MAX
    assert IPV4_MIN <= ipv4_netmask <= IPV4_MAX

    def hostmask_netmask(m):

christian-korneck

@echo off
setlocal

set inetgw=192.168.0.1

route delete 0.0.0.0 mask 0.0.0.0 "%inetgw%"

route delete 0.0.0.0 mask 248.0.0.0 "%inetgw%"
route delete 8.0.0.0	mask 254.0.0.0 "%inetgw%"
route delete 11.0.0.0 mask 255.0.0.0 "%inetgw%"

christian-korneck

overwrite a function (or just anything). Target doesn't need to be exported. Go doesn't support overloading. Can't be done multiple times (i.e. trying to overwrite time.Sleep() fails as it's actually the unexported runtime.timeSleep()).

package main

import (
	"fmt"
	_ "unsafe" // required to enable go:linkname

	"log"

christian-korneck

sudo grep -Eao '(-?[A-Z0-9]{5}){5}' /sys/firmware/acpi/tables/MSDM

christian-korneck

\\wsl$\<distro>
\\wsl$\fedoraremix
\\wsl$\AlmaLinux-8
\\wsl$\Debian
\\wsl$\Ubuntu
\\wsl$\Ubuntu-22.04

on W11 also: \\wsl.localhost\, i.e. \\wsl.localhost\fedoraremix

christian-korneck

build and install Python 3.7.13 from source on Fedora 36

dnf -y install gcc openssl-devel bzip2-devel libffi-devel zlib-devel xz-devel wget pkg-config
# optional:
# dnf -y groupinstall development-tools
cd /usr/src/
wget https://www.python.org/ftp/python/3.7.13/Python-3.7.13.tgz
tar xzf Python-3.7.13.tgz
cd Python-3.7.13/

christian-korneck

Postman - use request output as input for another request

Let's assume we request a JWT token from one endpoint and want to use it as Bearer Token in another request to a different endpoint.

We can:

• 1. store the output (or part of it) in an environment variable
  • in the JWT request create a test and add some javascript. This selects the value of the JSON token {root}.token and stores it in a Postman env var token:

    token = pm.response.json().token;
    

pm.environment.set("token", token);

christian-korneck

a config for Karabiner Elements, a MacOS keyboard mapper, that solves the following problem with the R-Go Split Keyboard (US/QWERTY) on MacOS:

• Problem: key combinations only work on one half of the keyboard (i.e. [LEFT SHIFT]+ [A] works, but [RIGHT SHIFT] + [A] doesn't).
  • Solution: [Right Shift] <-> [Left Shift] swapped
• Problem: Function (i.e. volume, etc) are mapped to the function keys
  • Solution: Function keys mapped to Function keys

More notes:

• How to turn off blinking logo LED (top left) on the R-Go Split keyboard: press FN + A

christian-korneck

package main

import (
	"errors"
	"fmt"
	"io/fs"
	"os"
)

// output: Failed at path: non-existing